sendlst.cpp

这次我将介绍如何更改其他程序ListView控件中某个Item的内容

/*
 *	Send LVM_SETITEMTEXT
 *	版权所有 (C) 2005 天津 赵春生
 *	2005.10.28
 *	http://timw.yeah.net
 *	http://timw.126.com
 *	本程序适用于:Win2KP+SP4[Windows TaskManager(5.0.2195.6620)]
 *				 WinXP+SP1[Windows TaskManager]
 *	代码在Win2000P+SP4 + VC6+SP6测试通过
*/


#include<windows.h>
#include<commctrl.h>



int APIENTRY WinMain(HINSTANCE hInstance,
                     HINSTANCE hPrevInstance,
                     LPSTR     lpCmdLine,
                     int       nCmdShow)
					 
{
	
	HWND hwnd;
	int iItem=0;
	LVITEM lvitem, *plvitem;
	DWORD PID;
	HANDLE hProcess;
	char *p_MyItemText;//目标程序中用来存放TEXT的地址

	//The pszText member is the pointer to a null-terminated
	//  string containing the new text; it can also be NULL.
	//以上信息是从API手册中获得的，故在本例中字符串长度不能>=12，
	//以确保字符串后有NULL。
	char str_MyItemText[12]={0};
	strcpy(str_MyItemText,"天津 赵春生");
	
	
	hwnd=FindWindow("#32770","Windows 任务管理器");
	hwnd=FindWindowEx(hwnd,0,"#32770",0);
	hwnd=FindWindowEx(hwnd,0,"SysListView32",0);

	if (!hwnd)
		
		MessageBox(NULL,"[Windows 任务管理器] 尚未启动！","错误！",NULL);
	
	else
	{

			GetWindowThreadProcessId(hwnd, &PID);
			
			hProcess=OpenProcess(PROCESS_ALL_ACCESS,false,PID);
			if (!hProcess)
				
				MessageBox(NULL,"获取进程句柄操作失败！","错误！",NULL);
			
			else
			{
				plvitem=(LVITEM*)VirtualAllocEx(hProcess, NULL, sizeof(LVITEM), MEM_COMMIT, PAGE_READWRITE);
				p_MyItemText=(char*)VirtualAllocEx(hProcess, NULL, 12, MEM_COMMIT, PAGE_READWRITE);

				if ((!plvitem)||(!p_MyItemText))
					
					MessageBox(NULL,"无法分配内存！","错误！",NULL);
				
				else
				{
					MessageBox(NULL,"本演示程序将更改TaskManager中第6个项目中第1列的内容。","提示",NULL);
					
					iItem=5;//5在这里是第六个（从零开始）
					lvitem.iSubItem=0;//同上
					lvitem.pszText=p_MyItemText;
					
					WriteProcessMemory(hProcess, p_MyItemText, &str_MyItemText, 12, NULL);
					WriteProcessMemory(hProcess, plvitem, &lvitem, sizeof(LVITEM), NULL);

					//向目标程序发送LVM_SETITEMTEXT消息
					SendMessage(hwnd, LVM_SETITEMTEXT, (WPARAM)iItem, (LPARAM)plvitem);
					
				}
			}
		}
	
	
	
	
	//释放内存
	CloseHandle(hwnd);
	CloseHandle(hProcess);
	VirtualFreeEx(hProcess, plvitem, 0, MEM_RELEASE);
	VirtualFreeEx(hProcess, p_MyItemText, 0, MEM_RELEASE);
	
	return 0;
}